sealing reliability
It needs to withstand the working pressure of the cooling system (usually ≤ 1.6MPa, with reinforced design up to 2.5MPa) and temperature fluctuations (such as -40 ℃ to 150 ℃) to ensure no leakage.
For example, the cooling system of an energy storage power station requires the sealing gasket to have a safety margin greater than 10 times under a static water pressure of 5.27MPa, achieving zero leakage in actual operation.
solvent resistance
It needs to be compatible with the cooling medium to avoid corrosion or swelling. For example:
Nitrile rubber (NBR): Good oil resistance, suitable for lubricating oil and fuel, but avoid contact with ketone solvents.
Ethylene propylene diene monomer (EPDM): resistant to high temperatures, steam, and weak acids/alkalis, suitable for temperatures ranging from -20 ℃ to 150 ℃.
Fluororubber (FKM): resistant to strong acids, strong alkalis, and high temperatures (-20 ℃~200 ℃), but at a higher cost.
Polytetrafluoroethylene (PTFE): resistant to strong corrosion and high temperatures (-200 ℃~260 ℃), but has poor elasticity and requires special design.
Environmental adaptability
Need to adapt to extreme environments, such as high-temperature deserts (temperature tolerance ≥ 150 ℃) or cold plateaus (temperature tolerance ≤ -40 ℃).
For example, silicone rubber is suitable for extreme environments ranging from -60 ℃ to 230 ℃, while fluororubber can be used for a long time above 200 ℃.
fatigue resistance
It needs to withstand long-term stress and pressure fluctuations to avoid seal failure. For example, the metal adhesive flexible graphite sealing gasket enhances rigidity through a metal skeleton, while utilizing the elasticity of flexible graphite to compensate for small deformations on the sealing surface.

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